The length, breadth and height of the room is 10 x 10 x 10 feet. She wants to paint the four walls and the ceiling. The room has one door of 7 feet by 3feet. Calculate the area which needs painting.
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6a^2-lb
where a represent the dimensions of the cubical room and l and b represents the dimensions of the gate.
600-21=579 feet^2
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